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Finding the Fourth Proportional to 57,999.60, 86,999.40 and 53,188.20

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Solution

The fourth proportional to 57,999.60, 86,999.40 and 53,188.20 is: 79,782.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,999.60 : 86,999.40 = 53,188.20 : x
  2. Step 2: Convert to fraction form
    57,999.60/86,999.40 = 53,188.20/x
  3. Step 3: Cross multiply
    57,999.60x = 86,999.40 × 53,188.20
  4. Step 4: Simplify right side
    57,999.60x = 4,627,341,487.08
  5. Step 5: Solve for x
    x = 4,627,341,487.08/57,999.60
  6. Step 6: Final answer
    x = 79,782.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.